Tarchia gigantea was a dinosaur of the Cretaceous. The systematic paleontology of it is:

Dinosauria Owen 1842

Ornithischia
Seeley 1887

Thyreophora Nopcsa

Ankylosauria Osborn 1923

Ankylosauridae Brown
1908

Tarchia Maryanska 1977

Tarchia gigantea Maryanska 1977=Dyoplosaurus giganteus Maleev 1956

Tarchia had a body length of 8-8.5 m. (26-27 feet). The skull was about 40 cm. (1.3 ft.) long and 45 cm. (1.5 ft.) wide.

The holotype (PIN 551-29) is a set of postcrania. It was found in the Nemegt Formation at the Nemegtu Mountain locality in Omnogov, Mongolia. This fossil specimen was unearthed in strata dating to a
Campanian-Maastrichtian span of 83.5
- 65.5 million years ago. Other remains of this interval were discovered in the Nemegt
Formation at Altan Ula IV, site 1 and the Khermeen Tsav locality in Omnogov, Mongolia. Some
fossil remains were found in the Barun Goyot Formation in the Nemegt Basin in Mongolia. They are dated to the Campanian age (83.5 - 70.6 million years ago) of the Cretaceous. [Note - The source of this information is The Paleobiology Database.]

Victoria M. Arbour, Nicolai L. Lech-Hernes, Tom E. Guldberg, Jorn H. Hurum, and Philip J. Currie wrote an article titled An ankylosauris dinosaur from Mongolia with in situ armour and keratinous scale impressions. It was
published in 2013 in Acta Palaeontologica Polonica 58(1): 55-64. The complete text is on this link.

My pleasure, Neal. We ve sure had a great discussion about it in FFD. (http://ffd2009.multiply.com/)I ll reiterate here that the study is based on material

Message 4 of 9
, Mar 2, 2013

My pleasure, Neal. We've sure had a great discussion about it in FFD. (http://ffd2009.multiply.com/)I'll reiterate here that the study is based on material discovered many years ago and doesn't include newer material found in the 1990s. It appears, however, that the older material is the best, and once described, quite revealing.

Tarchia was indeed big the biggest Asiatic ankylosaurid although Hanwulosaurus IF real, might've been even bigger.

My pleasure, Neal. We've sure had a great discussion about it in FFD. (http://ffd2009.multiply.com/)I'll reiterate here that the study is based on material discovered many years ago and doesn't include newer material found in the 1990s. It appears, however, that the older material is the best, and once described, quite revealing.

Tarchia was indeed big the biggest Asiatic ankylosaurid although Hanwulosaurus IF real, might've been even bigger.

Thanks, Tim; I m glad you posted this reply in seymouria. As we discussed in the FFD thread, Tarbosaurus was a theropod that co-existed with Tarchia

Message 6 of 9
, Mar 2, 2013

Thanks, Tim; I'm glad you posted this reply in seymouria. As we discussed in the FFD thread, Tarbosaurus was a theropod that co-existed with Tarchia and went after it. Making a frontal attack would have been a key factor in the attack strategy of Tarbosaurus. That would have enabled Tarbosaurus to avoid getting hit by the tail of Tarchia.

My pleasure, Neal. We've sure had a great discussion about it in FFD. (http://ffd2009.multiply.com/)I'll reiterate here that the study is based on material discovered many years ago and doesn't include newer material found in the 1990s. It appears, however, that the older material is the best, and once described, quite revealing.

Tarchia was indeed big the biggest Asiatic ankylosaurid although Hanwulosaurus IF real, might've been even bigger.

Hi guys, I just added FFD to the links section as requested. As for the putative attack strategy of Tarbosaurus see my latest, revised comment. Ankylosaurids

Message 7 of 9
, Mar 3, 2013

Hi guys, I just added FFD to the links section as requested. As for the putative attack strategy of Tarbosaurus see my latest, revised comment. Ankylosaurids like Tarchia evolved to counter this approach albeit not always successfully.

--- In seymouria@yahoogroups.com, Neal Robbins <ctn47496@...> wrote:
>
>
>
> Â Â Â Thanks, Tim; I'm glad you posted this reply in seymouria. As we discussed in the FFD thread, Tarbosaurus was a theropod that co-existed with Tarchia and went after it. Making a frontal attack would have been a key factor in the attack strategy of Tarbosaurus. That would have enabled Tarbosaurus to avoid getting hit by the tail of Tarchia.
>
> Â Â Neal
>
>
> ________________________________
> From: "uwtd@..." <uwtd@...>
> To: seymouria@yahoogroups.com
> Sent: Saturday, March 2, 2013 8:59 AM
> --- In seymouria@yahoogroups.com, Neal Robbins > >
>

Neal Robbins

Hi Tim, I m glad that you added the link. I looked at your comment in the thread about Tarchia on the FFD board. You stated a good point about Tarchia

Message 8 of 9
, Mar 3, 2013

Hi Tim, I'm glad that you added the link. I looked at your comment in the thread about Tarchia on the FFD board. You stated a good point about Tarchia turning its head to avoid attacks on its head. I made a reply that Tarchia would have had enough maneuverability to do that. I also mentioned that if more than one Tarbosaurus was involved in the assault on Tarchia, then Tarchia would have been at a disadvantage. Of course, that would not have been the usual scenario, since Tarbosaurus did not use pack hunting as its normal strategy.

Hi guys, I just added FFD to the links section as requested. As for the putative attack strategy of Tarbosaurus see my latest, revised comment. Ankylosaurids like Tarchia evolved to counter this approach albeit not always successfully.

--- In seymouria@yahoogroups.com, Neal Robbins wrote:
>
>
>
> Â Â Â Thanks, Tim; I'm glad you posted this reply in seymouria. As we discussed in the FFD thread, Tarbosaurus was a theropod that co-existed with Tarchia and went after it. Making a frontal attack would have been a key factor in the attack strategy of Tarbosaurus. That would have enabled Tarbosaurus to avoid getting hit by the tail of Tarchia.
>
> Â Â Neal
>
>
> ________________________________
> From: "uwtd@..."
> To: seymouria@yahoogroups.com
> Sent: Saturday, March 2, 2013 8:59 AM
> --- In seymouria@yahoogroups.com, Neal Robbins > >
>

uwtd@sbcglobal.net

As I just posted in FFD (last comment) some evidence suggests Tarbosaurus did hunt cooperatively or with others of its kind.

Message 9 of 9
, Mar 4, 2013

As I just posted in FFD (last comment) some evidence suggests Tarbosaurus did hunt cooperatively or with others of its kind.

--- In seymouria@yahoogroups.com, Neal Robbins <ctn47496@...> wrote:
>
>
>
> Â Â Hi Tim, I'm glad that you added the link. I looked at your comment in the thread about Tarchia on the FFD board. You stated a good point about Tarchia turning its head to avoid attacks on its head. I made a reply that Tarchia would have had enough maneuverability to do that. I also mentioned that if more than one Tarbosaurus was involved in the assault on Tarchia, then Tarchia would have been at a disadvantage. Of course, that would not have been the usual scenario, since Tarbosaurus did not use pack hunting as its normal strategy.
>
> Â Â Neal
>
>
> ________________________________
> From: "uwtd@..." <uwtd@...>
> To: seymouria@yahoogroups.com
> Sent: Sunday, March 3, 2013 7:02 AM
> Subject: [seymouria] Re: Tarchia - An Ankylosaurian Dinosaur of the Cre>
> --- In seymouria@yahoogroups.com, Neal Ro> >
> > ÃÂ ÃÂ Neal
> >
> >
> > ________________________________
> > From: "uwtd@"
> > To: seymouria@yahoogroups.com
> > Sent: Saturday, March 2, 2013 8:59 AM
> > --- In seymouria@yahoogroups.com, Neal Robbins > >
> >
>

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